OMAP3: beagle xm: enable up to 800MHz OPP

OMP3630 silicon can enable higher frequencies only depending on the board
characteristics meeting the recommended standards, and has to be selectively
toggled.

Beagle XM uses 3730 variant and the board design allows enabling 800MHz and
1GHz OPPs. However, We need Smart reflex class 1.5 and ABB to enable 1GHz
safely.  For the moment, we tweak the default table to allow for 800Mhz OPP
usage.

Reported-by: Koen Kooi <koen@beagleboard.org>
Tested-by: Koen Kooi <koen@beagleboard.org>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 46d814ab5656c078e6fad0a013c2ce8c39e312e5..91b4e1438aecea8116387c2c9358c3c96bafc72b 100644 (file)
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -23,6 +23,7 @@
 #include <linux/gpio.h>
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
+#include <linux/opp.h>
 
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
@@ -45,10 +46,12 @@
 #include <plat/gpmc.h>
 #include <plat/nand.h>
 #include <plat/usb.h>
+#include <plat/omap_device.h>
 
 #include "mux.h"
 #include "hsmmc.h"
 #include "timer-gp.h"
+#include "pm.h"
 
 #define NAND_BLOCK_SIZE                SZ_128K
 
@@ -610,6 +613,52 @@ static struct omap_musb_board_data musb_board_data = {
        .power                  = 100,
 };
 
+static void __init beagle_opp_init(void)
+{
+       int r = 0;
+
+       /* Initialize the omap3 opp table */
+       if (omap3_opp_init()) {
+               pr_err("%s: opp default init failed\n", __func__);
+               return;
+       }
+
+       /* Custom OPP enabled for XM */
+       if (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XM) {
+               struct omap_hwmod *mh = omap_hwmod_lookup("mpu");
+               struct omap_hwmod *dh = omap_hwmod_lookup("iva");
+               struct device *dev;
+
+               if (!mh || !dh) {
+                       pr_err("%s: Aiee.. no mpu/dsp devices? %p %p\n",
+                               __func__, mh, dh);
+                       return;
+               }
+               /* Enable MPU 1GHz and lower opps */
+               dev = &mh->od->pdev.dev;
+               r = opp_enable(dev, 800000000);
+               /* TODO: MPU 1GHz needs SR and ABB */
+
+               /* Enable IVA 800MHz and lower opps */
+               dev = &dh->od->pdev.dev;
+               r |= opp_enable(dev, 660000000);
+               /* TODO: DSP 800MHz needs SR and ABB */
+               if (r) {
+                       pr_err("%s: failed to enable higher opp %d\n",
+                               __func__, r);
+                       /*
+                        * Cleanup - disable the higher freqs - we dont care
+                        * about the results
+                        */
+                       dev = &mh->od->pdev.dev;
+                       opp_disable(dev, 800000000);
+                       dev = &dh->od->pdev.dev;
+                       opp_disable(dev, 660000000);
+               }
+       }
+       return;
+}
+
 static void __init omap3_beagle_init(void)
 {
        omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
@@ -633,6 +682,7 @@ static void __init omap3_beagle_init(void)
        omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);
 
        beagle_display_init();
+       beagle_opp_init();
 }
 
 MACHINE_START(OMAP3_BEAGLE, "OMAP3 Beagle Board")